CN111336485A - Liquid-solid direct contact steam generator - Google Patents
Liquid-solid direct contact steam generator Download PDFInfo
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- CN111336485A CN111336485A CN202010210143.0A CN202010210143A CN111336485A CN 111336485 A CN111336485 A CN 111336485A CN 202010210143 A CN202010210143 A CN 202010210143A CN 111336485 A CN111336485 A CN 111336485A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/04—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to the field of energy and environment, and particularly relates to a liquid-solid direct contact steam generator which comprises a plurality of pressure pipelines with screw conveyors, wherein each pressure pipeline is respectively connected with a solid particle pipeline and a steam pipeline, the end part of each pressure pipeline is provided with a liquid pipeline, the liquid pipeline is positioned at the end part close to the steam pipeline, the pressure pipeline at one end of the liquid pipeline is provided with a particle discharge port, and valves are respectively arranged on each solid particle pipeline, each steam pipeline, each liquid pipeline and each particle discharge port. The invention adopts the mode that the hot solid particles are in direct contact with the liquid for heat exchange, the hot solid particles directly transfer heat to the liquid to change the liquid into steam, and the middle part does not pass through an additional wall surface, thereby obviously improving the heat exchange coefficient, improving the heat exchange efficiency and avoiding the loss of the heat exchange wall surface. The volume of the liquid-solid direct contact type steam generator is obviously smaller than that of the traditional steam generator under the same heat exchange quantity, thereby reducing the manufacturing and operating cost.
Description
Technical Field
The invention relates to a liquid-solid direct contact steam generator, belonging to the field of energy and environment.
Background
The hot solid particles are widely used in various production links of power plants, steel plants, petrochemical industries and the like, the slag discharged by a power plant boiler is more than 800 ℃, the slag temperature of blast furnace iron-making slag of the steel plants is about 1500 ℃, calcined petroleum coke of petrochemical enterprises also has very high temperature, the recovery of the waste heat of the high-temperature solid particles has great significance for saving energy, and the waste heat of solid materials is recovered by adopting a multi-form dividing wall type high-temperature solid particle heat exchanger or a heat accumulating type heat exchanger at present.
The solid particle waste heat recovery technology adopting the dividing wall type heat exchanger and the like has the defects that the equipment is initially built or is transformed and upgraded with huge investment, the recovery period is long, solid particles can cause the problems of serious abrasion and channel blockage on a heat exchange surface, the service life of the equipment is difficult to guarantee, and when the temperature of the hot solid particles is not too high, the recovery efficiency is seriously reduced, and no economy is realized.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a solid direct contact's steam generator of liquid utilizes liquid and hot solid particle direct contact to carry out the heat transfer between liquid solid, and the difference in temperature that needs is little, and total heat transfer area is big, and heat transfer heat flow is big to because the irregular motion of solid particle can further improve the heat exchange efficiency of solid particle and liquid, even the lower mesh that also can reach the production steam of solid particle temperature.
The invention relates to a liquid-solid direct contact steam generator, which comprises a plurality of pressure pipelines with screw conveyors, wherein each pressure pipeline is respectively communicated with a solid particle pipeline, a steam pipeline and a liquid pipeline, the steam pipeline is positioned between the solid particle pipeline and the liquid pipeline, the opposite end of the solid particle pipeline on each pressure pipeline is provided with a particle discharge port, and valves are respectively arranged on each solid particle pipeline, each steam pipeline, each liquid pipeline and each particle discharge port.
The solid particle pipeline, the pressure pipeline and the particle discharge port are internally communicated with solid particles to form a solid particle conveying channel, and the steam pipeline, the pressure pipeline and the liquid pipeline form a steam generation channel.
Each pressure pipeline alternately carries out a particle loading link and a steam generation link.
At least one pressure pipeline in the plurality of pressure pipelines is in a steam generation link.
At least two pressure pipelines with screw conveyors are arranged.
Each solid particle pipeline is respectively communicated with a particle main pipeline, each steam pipeline is respectively communicated with a steam main pipeline, and each liquid pipeline is respectively communicated with a liquid main pipeline.
The screw conveyor is driven by a motor, the motor is arranged at the end part of the pressure pipeline, and the motor is close to the end part of one side of the solid particle pipeline.
The solid particle pipeline and the steam pipeline are respectively positioned on the side parts of the pressure pipeline, the liquid pipeline is positioned on the end part of the pressure pipeline, and the two ends of the pressure pipeline are respectively sealed through pressure pipeline sealing covers.
The solid particles are spherical, ellipsoidal or irregular in shape.
The liquid is water, liquid inorganic matter or liquid organic matter.
Each pressure pipeline is provided with a particle inlet, a particle outlet, a liquid inlet and a steam outlet, a spiral conveyor is arranged in each pressure pipeline, the spiral conveyor and the pressure pipelines are sealed through pressure pipeline sealing covers arranged on two sides, the spiral conveyor is driven by a motor arranged on the outer side of each pressure pipeline, and when the motor is started, solid particles can be filled into and discharged out of the pressure pipelines.
The steam generator is internally provided with a plurality of pressure pipelines with screw conveyors, liquid directly absorbs heat of solid particles to be changed into steam when the liquid directly contacts with the hot solid particles, each pressure pipeline is provided with two operation links, in the steam generation link, the solid particle pipeline is closed, the steam pipeline and the liquid pipeline are opened, the pressure pipelines operate at high pressure, and the liquid absorbs heat of the solid particles to generate steam in the flowing process. In the solid particle loading link, a steam pipeline and a liquid pipeline are closed, the solid particle pipeline is opened, a pressure pipeline runs at normal pressure, cold solid particles are discharged from the pipeline under the driving of a screw conveyor, hot solid particles enter the pipeline, in order to ensure continuous generation of steam, the liquid-solid direct contact steam generator adopts a plurality of pressure pipelines to alternately generate steam, and at least one pressure pipeline is ensured to be in a steam generation link at any moment. The heat exchange among the steam-water mixture, the saturated steam and the superheated steam in the process of completely gasifying the solid particles, the liquid and the liquid into the steam is direct contact heat exchange. The solid particles are made of metal, nonmetal or composite materials.
The invention has the beneficial effects that:
1. this solid direct contact's of liquid steam generator adopts hot solid particle and liquid direct contact's mode to carry out the heat transfer, and hot solid particle directly transmits heat for liquid and makes liquid become steam, and the centre no longer passes through extra wall, can show improvement heat transfer coefficient, improves heat exchange efficiency to avoid the loss of heat transfer wall, even the temperature of solid particle is only a little higher than steam saturation temperature also can effectively be with liquid vaporization. In addition, the solid particles are small in size, the total heat exchange area is large, the liquid flow process can drive the solid particles to move irregularly, the heat exchange coefficient can be further improved, the heat exchange heat flow is increased, and the size of the liquid-solid direct contact type steam generator is remarkably smaller than that of a traditional steam generator under the same heat exchange amount, so that the manufacturing and running cost is reduced.
2. The liquid-solid direct contact steam generator is internally provided with a plurality of pressure pipelines with screw conveyors, wherein liquid directly absorbs heat of solid particles to become steam, two links of each pressure pipeline alternately operate, in the steam generation link, a solid particle conveying channel is closed, a steam-water channel is opened, the pressure pipelines operate at high pressure, and the liquid absorbs heat of the solid particles in the flowing process to generate steam. In the solid particle loading link, a steam-water channel is closed, a solid particle conveying channel is opened, a pressure pipeline runs at normal pressure, cold solid particles are discharged out of the pipeline under the driving of a screw conveyor, hot solid particles enter the pipeline, and at least one pressure pipeline is in a steam generation link at any moment to ensure that steam is continuously generated.
3. The solid particles are made of metal, nonmetal or composite materials, are spherical, ellipsoidal or irregular in shape, and have wide application range.
4. The liquid is water, liquid inorganic matter or liquid organic matter, and has wide application range.
Drawings
FIG. 1 is a schematic view of the structure of the horizontal arrangement of the flues in the invention.
In the figure: 1. a total particle inlet; 2a, a first particle inlet valve; 2b, a second particle inlet valve; 3a, a first particle conduit; 3b, a second particle conduit; 4a, a first motor; 4b, a second motor; 5a, sealing the front pressure pipeline; 5b, sealing the rear pressure pipeline; 6a, a first pressure pipeline particle inlet; 6b, a second pressure pipeline particle inlet; 7a, a first pressure pipeline steam outlet; 7b, a second pressure pipeline steam outlet; 8a, a first screw conveyor; 8b, a second screw conveyor; 9a, a first pressure pipeline; 9b, a second pressure pipeline; 10a, a first particle discharge valve; 10b, a second particle discharge valve; 11a, a first particle discharge port; 11b, a second particle discharge port; 12a, a first liquid inlet; 12b, a second liquid inlet; 13a, a first liquid inlet valve; 13b, a second liquid inlet valve; 14a, a first steam outlet valve; 14b, a second steam outlet valve; 15. a liquid main inlet; 16. a liquid main conduit; 17. a steam main pipe; 18. a main steam outlet.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the steam generator with direct liquid-solid contact according to the present invention includes a plurality of pressure pipes with screw conveyors, each pressure pipe is connected to a solid particle pipe, a steam pipe and a liquid pipe, the steam pipe is located between the solid particle pipe and the liquid pipe, the opposite end of the solid particle pipe on the pressure pipe is provided with a particle discharge port, and each of the solid particle pipe, the steam pipe, the liquid pipe and the particle discharge port is provided with a valve. The solid particle pipeline, the pressure pipeline and the particle discharge port are internally communicated with solid particles to form a solid particle conveying channel, and the steam pipeline, the pressure pipeline and the liquid pipeline form a steam generating channel. Each pressure pipeline alternately carries out a particle loading link and a steam generation link. At least one of the plurality of pressure pipes is in a steam generation link. At least two pressure pipelines with screw conveyors are arranged. Each solid particle pipeline is respectively communicated with a particle main pipeline, each steam pipeline is respectively communicated with a steam main pipeline, and each liquid pipeline is respectively communicated with a liquid main pipeline. The auger is driven by a motor located at the end of the pressure pipe, the motor being located near the end of one side of the solids pipe. The solid particle pipeline and the steam pipeline are respectively positioned on the side parts of the pressure pipeline, the liquid pipeline is positioned on the end part of the pressure pipeline, and the two ends of the pressure pipeline are respectively sealed by the pressure pipeline sealing covers. The solid particles may be spherical, ellipsoidal or irregular in shape. The liquid is water, liquid inorganic matter or liquid organic matter. Each pressure pipeline is connected with a particle inlet, a particle outlet, a liquid inlet and a steam outlet, a spiral conveyor is arranged in each pressure pipeline, the sealing between the spiral conveyor and the pressure pipelines is realized through pressure pipeline sealing covers arranged on two sides, the spiral conveyor is driven by a motor arranged on the outer side of each pressure pipeline, and when the motor is started, solid particles can be filled into and discharged out of the pressure pipelines.
The present embodiment takes two pressure pipes with screw conveyors as an example:
the two pressure pipelines are respectively a first pressure pipeline 9a and a second pressure pipeline 9b, and a first screw conveyor 8a and a second screw conveyor 8b are respectively arranged in the two pressure pipelines. Both ends of the two pressure pipelines are sealed by a front pressure pipeline sealing cover 5a and a rear pressure pipeline sealing cover 5 b. A first pressure pipeline particle inlet 6a is arranged between the first particle pipeline 3a and the first pressure pipeline 9a, and a second pressure pipeline particle inlet 6b is arranged between the second particle pipeline 3b and the second pressure pipeline 9 b; the two steam pipelines are respectively a first pressure pipeline steam outlet 7a and a second pressure pipeline steam outlet 7b at the connection part of the two steam pipelines and the two pressure pipelines; the two liquid pipelines are respectively a first liquid inlet 12a and a second liquid inlet 12b at the connection part of the two pressure pipelines.
The operation process comprises the following steps:
step 1), hot solid particles continuously enter a particle main inlet 1, liquid main pipelines 16 and liquid inlets 15 are provided with liquid continuous inlets, and steam main pipelines 17 and steam outlets 18 are provided with steam continuous outlets.
Step 2) the first pressure pipeline 9a is in a steam generation link, and the second pressure pipeline 9b is in a solid particle loading link:
the first motor 4a is stopped, the first pellet inlet valve 2a and the first pellet discharge valve 10a are closed, the first liquid inlet valve 13a and the first vapor outlet valve 14a are opened, the first pressure piping 9a is brought into a high pressure state in which the liquid absorbs heat to become vapor and is introduced into the vapor header piping 17; the second liquid inlet valve 13b and the second vapor outlet valve 14b are closed and the second pellet inlet valve 2b and the second pellet discharge valve 10b are opened to ensure that pellets enter the pressure pipe 9b at normal pressure, and the second motor 4b is activated to drive the second screw conveyor 8b to load hot solid pellets into the second pressure pipe 9b while discharging cold solid pellets through the second pellet discharge port 11 b.
Step 3), the first pressure pipeline 9a is in a solid particle loading link, and the second pressure pipeline 9b is in a steam generation link:
the second motor 4b is stopped, the second particle inlet valve 2b and the second particle discharge valve 10b are closed, the second liquid inlet valve 13b and the second vapor outlet valve 14b are opened, the second pressure pipe 9b enters a high pressure state in which the liquid absorbs heat to become vapor and enters the vapor main pipe 17; the first liquid inlet valve 13a and the first vapor outlet valve 14a are closed and the first pellet inlet valve 2a and the first pellet discharge valve 10a are opened to ensure that pellets are introduced into the first pressure pipe 9a at normal pressure, and the first motor 4a is activated to drive the first screw conveyor 8a to load hot solid pellets into the first pressure pipe 9a while discharging cold solid pellets through the first pellet discharge port 11 a.
Step 4) repeatedly and circularly performing the step 2) and the step 3).
The invention utilizes hot solid particles and liquid to directly contact and exchange heat in the pressure pipeline to generate steam, the hot solid particles and the liquid have extremely high heat exchange coefficient, the temperature difference between the hot solid particles and the liquid required by the vaporization of the liquid into the steam is small, the solid particles have small volume and large total heat exchange area, the solid particles can be driven to generate irregular motion in the flowing process of the liquid, the heat exchange coefficient can be obviously improved, the heat exchange efficiency is improved, under the same heat exchange quantity, the volume of the liquid-solid direct contact type steam generator is obviously smaller than that of the traditional steam generator, the steam generator is provided with a plurality of pressure pipelines, each pressure pipeline is alternately loaded with the solid particles and alternately generates the steam, and the steam generator externally shows continuous solid particle loading and continuous.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. A liquid-solid direct contact steam generator is characterized in that: the device comprises a plurality of pressure pipelines with screw conveyors, wherein each pressure pipeline is respectively communicated with a solid particle pipeline, a steam pipeline and a liquid pipeline, the steam pipeline is positioned between the solid particle pipeline and the liquid pipeline, the opposite end of the solid particle pipeline on each pressure pipeline is provided with a particle discharge port, and each solid particle pipeline, each steam pipeline, each liquid pipeline and each particle discharge port are respectively provided with a valve.
2. The liquid-solid direct contact steam generator of claim 1, wherein: the solid particle pipeline, the pressure pipeline and the particle discharge port are internally communicated with solid particles to form a solid particle conveying channel, and the steam pipeline, the pressure pipeline and the liquid pipeline form a steam generating channel.
3. The liquid-solid direct contact steam generator of claim 1, wherein: each pressure pipeline alternately carries out a particle loading link and a steam generation link.
4. The liquid-solid direct contact steam generator of claim 3, wherein: at least one of the plurality of pressure pipes is in a steam generation link.
5. The liquid-solid direct contact steam generator of claim 1, wherein: at least two pressure pipelines with screw conveyors are arranged.
6. The liquid-solid direct contact steam generator of claim 1, wherein: each solid particle pipeline is respectively communicated with a particle main pipeline, each steam pipeline is respectively communicated with a steam main pipeline, and each liquid pipeline is respectively communicated with a liquid main pipeline.
7. The liquid-solid direct contact steam generator of claim 1, wherein: the auger is driven by a motor located at the end of the pressure pipe, the motor being located near the end of one side of the solids pipe.
8. The liquid-solid direct contact steam generator of claim 1, wherein: the solid particle pipeline and the steam pipeline are respectively positioned on the side parts of the pressure pipeline, the liquid pipeline is positioned on the end part of the pressure pipeline, and the two ends of the pressure pipeline are respectively sealed by the pressure pipeline sealing covers.
9. The liquid-solid direct contact steam generator of claim 1, wherein: the solid particles may be spherical, ellipsoidal or irregular in shape.
10. The liquid-solid direct contact steam generator of claim 1, wherein: the liquid is water, liquid inorganic matter or liquid organic matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010210143.0A CN111336485A (en) | 2020-03-24 | 2020-03-24 | Liquid-solid direct contact steam generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010210143.0A CN111336485A (en) | 2020-03-24 | 2020-03-24 | Liquid-solid direct contact steam generator |
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| CN111336485A true CN111336485A (en) | 2020-06-26 |
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| CN202010210143.0A Pending CN111336485A (en) | 2020-03-24 | 2020-03-24 | Liquid-solid direct contact steam generator |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3630546A1 (en) * | 1986-09-08 | 1988-03-10 | Michael Laumen | Instantaneous steam generator and steam recuperator |
| JP2001355009A (en) * | 2000-06-14 | 2001-12-25 | Kaihatsu Dengyo Kk | Heat exchanger for slag particles |
| CN102268495A (en) * | 2011-07-20 | 2011-12-07 | 北京中冶设备研究设计总院有限公司 | Process technology and equipment for granulating blast-furnace slag and utilizing waste heat |
| CN102338373A (en) * | 2010-07-19 | 2012-02-01 | 肖建选 | High-efficient combustion furnace with self-steam-supplying combustion-supporting function |
| CN102776302A (en) * | 2012-08-03 | 2012-11-14 | 北京硕人海泰能源环境技术有限公司 | Liquid slag waste heat recovery device and method for recovering slag waste heat by utilizing same |
| CN104214061A (en) * | 2014-09-05 | 2014-12-17 | 中国科学院工程热物理研究所 | Solar thermal power system |
| CN104266157A (en) * | 2014-10-12 | 2015-01-07 | 中国科学院工程热物理研究所 | Direct contact type high temperature particle fluidization steam generator |
-
2020
- 2020-03-24 CN CN202010210143.0A patent/CN111336485A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3630546A1 (en) * | 1986-09-08 | 1988-03-10 | Michael Laumen | Instantaneous steam generator and steam recuperator |
| JP2001355009A (en) * | 2000-06-14 | 2001-12-25 | Kaihatsu Dengyo Kk | Heat exchanger for slag particles |
| CN102338373A (en) * | 2010-07-19 | 2012-02-01 | 肖建选 | High-efficient combustion furnace with self-steam-supplying combustion-supporting function |
| CN102268495A (en) * | 2011-07-20 | 2011-12-07 | 北京中冶设备研究设计总院有限公司 | Process technology and equipment for granulating blast-furnace slag and utilizing waste heat |
| CN102776302A (en) * | 2012-08-03 | 2012-11-14 | 北京硕人海泰能源环境技术有限公司 | Liquid slag waste heat recovery device and method for recovering slag waste heat by utilizing same |
| CN104214061A (en) * | 2014-09-05 | 2014-12-17 | 中国科学院工程热物理研究所 | Solar thermal power system |
| CN104266157A (en) * | 2014-10-12 | 2015-01-07 | 中国科学院工程热物理研究所 | Direct contact type high temperature particle fluidization steam generator |
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Application publication date: 20200626 |